CN111974353A - Method for preparing hydrophobic biochar by using silane coupling agent KH-570 - Google Patents
Method for preparing hydrophobic biochar by using silane coupling agent KH-570 Download PDFInfo
- Publication number
- CN111974353A CN111974353A CN202010883038.3A CN202010883038A CN111974353A CN 111974353 A CN111974353 A CN 111974353A CN 202010883038 A CN202010883038 A CN 202010883038A CN 111974353 A CN111974353 A CN 111974353A
- Authority
- CN
- China
- Prior art keywords
- biochar
- hours
- placing
- mixed solution
- coupling agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002209 hydrophobic effect Effects 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000006087 Silane Coupling Agent Substances 0.000 title claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 16
- 239000003607 modifier Substances 0.000 claims abstract description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000011259 mixed solution Substances 0.000 claims abstract description 10
- 238000007664 blowing Methods 0.000 claims abstract description 8
- 238000002791 soaking Methods 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 239000000706 filtrate Substances 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- 238000012216 screening Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 235000019441 ethanol Nutrition 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 13
- 238000001179 sorption measurement Methods 0.000 abstract description 7
- 239000003610 charcoal Substances 0.000 abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 abstract description 4
- 239000001301 oxygen Substances 0.000 abstract description 4
- 239000002028 Biomass Substances 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000047 product Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 15
- 239000007789 gas Substances 0.000 description 6
- 230000009467 reduction Effects 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
- 230000035699 permeability Effects 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000005431 greenhouse gas Substances 0.000 description 2
- 125000001165 hydrophobic group Chemical group 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000002329 infrared spectrum Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 229910014571 C—O—Si Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28011—Other properties, e.g. density, crush strength
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3085—Chemical treatments not covered by groups B01J20/3007 - B01J20/3078
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B1/00—Dumping solid waste
- B09B1/004—Covering of dumping sites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
- B01D2257/7022—Aliphatic hydrocarbons
- B01D2257/7025—Methane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/20—Capture or disposal of greenhouse gases of methane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Environmental & Geological Engineering (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a method for preparing hydrophobic biochar by using a silane coupling agent KH-570. Screening out biochar with a mesh of 40-60 by using a standard screen, placing the biochar in an electrothermal blowing drying box at 150 ℃ for drying for 24 hours, then placing the dried biochar in a dryer for sealing and cooling to room temperature, soaking the cooled biochar in a modifier mixed solution, stirring and soaking the biochar for reaction for 12 hours at room temperature by using a magnetic stirrer, standing and filtering the modifier mixed solution by using a funnel, wherein the filtering time is 30min, then washing the filtrate by using absolute ethyl alcohol for 3-5 times, and finally placing the washed filtrate in an electrothermal blowing drying box at 50 ℃ for drying for 4 hours to obtain the hydrophobic biochar. The chemical modifier used in the method effectively improves the hydrophobicity of the biomass charcoal, the operation condition is easy to control, and the modified product is more stable. The modified charcoal can promote the adsorption of the covering layer on methane, is beneficial to oxygen entering the covering layer and can reduce the entering of rainwater.
Description
Technical Field
The invention belongs to the field of preparation of hydrophobic biochar materials, and particularly relates to a method for preparing hydrophobic biochar by using a silane coupling agent KH-570.
Background
Methane (CH)4) Is in addition to carbon dioxide (CO)2) The other most important greenhouse gas, whose global warming potential is CO225 times of the total amount of the additive, the contribution to global warming can reach 15 percent. CH generated by refuse landfill4Is the third largest source of emissions caused by human activity following agricultural production activities, coal mining. Thus, how to realize landfill greenhouse gas CH4Have received a great deal of attention for emission reduction.
Landfill CH4Emission reduction technologies can be mainly divided into three categories, namely resource utilization, tail end control and in-situ emission reduction. For medium and small landfill sites, the CH can be effectively reduced by 70-90 percent by adopting an in-situ emission reduction technology such as quasi-aerobic landfill4And (5) discharging gas. However, in CH4In old or abandoned landfills with concentrations below 20%, resource utilization and flare combustion are not feasible, and the installation of a gas collection system is not economically feasible. Even in newly built landfill sites, the gas collection system is unlikely to reduce emissions of all landfill gas. In the active stage of landfill garbage degradation, the combined collection system of engineering and technical means and the soil covering layer or the independent use of the soil covering layer in old landfill sites and waste landfill sites can reduce CH maximally4And (5) discharging. Thus, an efficient coverage system is employed, via the CH4The adsorption and biochemical oxidation processes can reduce CH considerably4And (5) discharging.
Compared with the traditional soil covering layer, the biochar covering layer has more technologyThe advantages are that: (1) strengthened CH4Adsorption; (2) the porosity and the specific surface area are larger, and the air permeability of a covering layer is improved; (3) the methane-oxidizing bacteria can be conveniently existed in the high-porosity charcoal, and the growth and proliferation of the methane-oxidizing bacteria are facilitated; (4) enhancing gas transfer; (5) is a sustainable and inexpensive option to reduce landfill gas. However, the waterproof capability of the biochar modified soil covering layer technology is weak, and researches show that the soil permeability coefficient of 10 percent biochar added is larger than 10-7cm/s. The increase in water content of the coating due to the increase in permeability coefficient affects CH4Adsorption, which in turn affects CH4Emission reduction due to the ability of water to coat the surface of the biochar and the pores of the biochar. Therefore, the biochar with high hydrophobicity and proper particle size is distributed in the covering layer, so that the absorption of the covering layer on methane can be promoted, oxygen can enter the covering layer conveniently, and rainwater can be reduced.
Disclosure of Invention
The invention aims to provide a method for preparing hydrophobic biochar by using a silane coupling agent KH-570.
The idea of the invention is as follows: modified high-hydrophobicity modified biochar with proper particle size is added into the covering layer, so that oxygen can enter the covering layer conveniently on the basis of promoting the methane adsorption of the covering layer, and rainwater can be reduced.
The method comprises the following specific steps:
screening out biochar with a mesh of 40-60 by using a standard screen, placing the biochar in an electrothermal blowing drying box at 150 ℃ for drying for 24 hours, then placing the dried biochar in a dryer for sealing and cooling to room temperature, soaking the cooled biochar in a modifier mixed solution, stirring and soaking the biochar for reaction for 12 hours at room temperature by using a magnetic stirrer, standing and filtering the modifier mixed solution by using a funnel, wherein the filtering time is 30min, then washing the filtrate by using absolute ethyl alcohol for 3-5 times, and finally placing the washed filtrate in an electrothermal blowing drying box at 50 ℃ for drying for 4 hours to obtain the hydrophobic biochar.
In the modifier mixed solution, the mass percent concentration of the silane coupling agent KH-570 is 20%, the mass percent concentration of the ethanol is 72%, and the mass percent concentration of the water is 8%.
The method has the advantages that:
the method provided by the invention adjusts the relationship between the particle size and the content ratio of the biochar aiming at the contradiction relationship between the permeability coefficient of the covering layer of the landfill and the methane adsorption and oxidation efficiency of the system. The used chemical modifier effectively improves the hydrophobicity of the biomass charcoal, the operation condition is easy to control, and the modified product is more stable. The modified charcoal can promote the adsorption of the covering layer on methane, is beneficial to oxygen entering the covering layer and can reduce the entering of rainwater.
Drawings
FIG. 1 is an electron microscope scan of the original biochar.
FIG. 2 is an electron microscope scanning image of the hydrophobic biochar prepared by the embodiment of the invention.
FIG. 3 is an infrared spectrum of raw biochar and hydrophobic biochar made according to an embodiment of the present invention.
Detailed Description
Example (b):
the present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
Placing 40-60 mesh biochar which is sieved by a standard sieve in an electrothermal blowing drying box at 150 ℃ for drying for 24 hours, then placing the biochar in a dryer for sealing and cooling to room temperature, soaking the cooled biochar in a modifier mixed solution, stirring and soaking the biochar with a magnetic stirrer at room temperature for reaction for 12 hours to fully mix the biochar with a modifier, standing and filtering the modifier mixed solution for 30 minutes by using a funnel after the reaction is finished, washing the modified biochar with absolute ethyl alcohol for 3 times to remove a residual silane coupling agent KH-570, then placing the biochar in an electrothermal blowing drying box at 50 ℃ for drying for 4 hours, and removing alcohol and water in the biochar to obtain the hydrophobic biochar.
As shown in fig. 1 and 2, Scanning Electron Micrographs (SEM) of the raw biochar and the hydrophobic biochar prepared in this example, respectively.
The original biochar is obtained by analysis to have a vertical porous structure, a rough surface and more and fine particles; in contrast, it can be seen from the figure that the hydrophobic biochar not only has a porous structure, but also has a relatively smooth surface, which is not conducive to water droplet adhesion.
As shown in fig. 3, which is an infrared spectrum of the original biochar and the hydrophobic biochar manufactured in the example of the present invention.
The original biochar is obtained by analysis at a wave number of 3400cm-1Has a strong-OH stretching vibration peak, which shows that the original biochar surface has a large amount of-OH. The hydrophobic biochar modified by the silane coupling agent KH-570 has no obvious stretching vibration peak at the position, and the wave number is 2950 cm-1And 1720cm-1The stretching vibration absorption peaks of C-H and C = O corresponding to KH-570 appeared because-OH of the original biochar surface was substituted by hydrophobic groups in KH570 and the number of-OH groups was significantly reduced; at wave number 1050cm-1The modified hydrophobic biochar has a stretching vibration absorption peak which is obviously stronger and wider than that of the original biochar, and the original biochar is proved to have a grafting reaction with a modifier to generate a large amount of C-O-Si and Si-O-, and hydrophobic groups in KH-570 are effectively combined to the surface of the original biochar to form a hydrophobic organic coating layer.
Claims (1)
1. A method for preparing hydrophobic biochar by using a silane coupling agent KH-570 is characterized by comprising the following specific steps:
screening out biochar with a mesh of 40-60 by using a standard screen, placing the biochar in an electrothermal blowing drying box at 150 ℃ for drying for 24 hours, then placing the dried biochar in a dryer for sealing and cooling to room temperature, soaking the cooled biochar in a modifier mixed solution, stirring and soaking the biochar for reaction for 12 hours at room temperature by using a magnetic stirrer, standing and filtering the modifier mixed solution by using a funnel, wherein the filtering time is 30min, then washing the filtrate by using absolute ethyl alcohol for 3-5 times, and finally placing the washed filtrate in an electrothermal blowing drying box at 50 ℃ for drying for 4 hours to obtain hydrophobic biochar;
in the modifier mixed solution, the mass percent concentration of the silane coupling agent KH-570 is 20%, the mass percent concentration of the ethanol is 72%, and the mass percent concentration of the water is 8%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010883038.3A CN111974353A (en) | 2020-08-28 | 2020-08-28 | Method for preparing hydrophobic biochar by using silane coupling agent KH-570 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010883038.3A CN111974353A (en) | 2020-08-28 | 2020-08-28 | Method for preparing hydrophobic biochar by using silane coupling agent KH-570 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111974353A true CN111974353A (en) | 2020-11-24 |
Family
ID=73441243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010883038.3A Pending CN111974353A (en) | 2020-08-28 | 2020-08-28 | Method for preparing hydrophobic biochar by using silane coupling agent KH-570 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111974353A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112934174A (en) * | 2021-01-27 | 2021-06-11 | 广州安赛化工有限公司 | Preparation method and application of organosilane modified biomass charcoal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108102655A (en) * | 2017-12-20 | 2018-06-01 | 安徽省上行山茶叶有限公司 | A kind of soil remediation additive for cadmium pollution white tea plantation field |
| CN109233859A (en) * | 2018-10-29 | 2019-01-18 | 云南圣清环保科技有限公司 | A kind of porous sustained-release composite passivant and the preparation method and application thereof for heavy metal-polluted soil passivation |
| CN110371945A (en) * | 2019-06-22 | 2019-10-25 | 桂林理工大学 | A kind of preparation method of hydrophobically modified charcoal |
-
2020
- 2020-08-28 CN CN202010883038.3A patent/CN111974353A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108102655A (en) * | 2017-12-20 | 2018-06-01 | 安徽省上行山茶叶有限公司 | A kind of soil remediation additive for cadmium pollution white tea plantation field |
| CN109233859A (en) * | 2018-10-29 | 2019-01-18 | 云南圣清环保科技有限公司 | A kind of porous sustained-release composite passivant and the preparation method and application thereof for heavy metal-polluted soil passivation |
| CN110371945A (en) * | 2019-06-22 | 2019-10-25 | 桂林理工大学 | A kind of preparation method of hydrophobically modified charcoal |
Non-Patent Citations (1)
| Title |
|---|
| 薛晨楠: "疏水性生物炭改性土壤覆盖层强化甲烷减排技术的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112934174A (en) * | 2021-01-27 | 2021-06-11 | 广州安赛化工有限公司 | Preparation method and application of organosilane modified biomass charcoal |
| CN112934174B (en) * | 2021-01-27 | 2023-08-11 | 广州安赛化工有限公司 | Preparation method and application of organosilane modified biomass charcoal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107088399B (en) | Preparation method and application of mushroom bran biochar adsorbent | |
| CN109809403B (en) | Preparation method and application of biogas residue-based activated carbon with high adsorption performance | |
| CN113198516A (en) | Iron-nitrogen co-doped biochar catalyst, and preparation method and application thereof | |
| CN108264045A (en) | The method that abandoned biomass pyrolytic tar prepares superhigh specific surface area porous carbon material | |
| CN112058227A (en) | Preparation method and application of blue algae modified biochar with high adsorption efficiency | |
| CN110697707A (en) | Method for preparing high-performance activated carbon organic pollutant adsorbent by using edible fungus residues | |
| CN104087326A (en) | Method for preparing biochar by taking organic solid wastes of agriculture and forestry as raw materials in wet thermal cracking manner | |
| CN112745154B (en) | Method for reducing methane gas emission in cow dung composting process | |
| CN110743498A (en) | Preparation method of edible fungus residue biochar | |
| CN111974353A (en) | Method for preparing hydrophobic biochar by using silane coupling agent KH-570 | |
| CN111408373A (en) | 3D catalyst for catalytic degradation of organic pollutants and preparation and application thereof | |
| CN110614078A (en) | Preparation of potassium permanganate modified heavy metal cadmium adsorbent | |
| CN104045388B (en) | A kind of charcoal is as the application of external source amendment in sludge composting | |
| CN113952926B (en) | Method for synchronously removing arsenic and organic pollutants by using ferrihydrite nanoparticle-loaded biochar prepared by combining biological/chemical means | |
| CN108821283B (en) | Method for preparing activated carbon by using fir bark microwave-assisted hydrothermal method | |
| CN115010524A (en) | Modified biochar for reducing greenhouse gas emission in sludge composting process and preparation method and application method thereof | |
| CN113842882A (en) | Preparation method of wheat straw modified biochar for removing tetracycline in water body | |
| CN106744949A (en) | A kind of method for preparing activated carbon as raw material with sesame stalk | |
| CN113509904A (en) | Sulfamic acid modified camellia oleifera shell biochar material, and preparation method and application thereof | |
| CN104815831A (en) | Deodorant prepared by using organic solid waste and application thereof | |
| CN108569768A (en) | A kind of method that maize straw prepares artificial swamp matrix | |
| CN111495349A (en) | Modified biomass charcoal catalyst based on activated sludge and preparation method thereof | |
| CN108993408B (en) | Preparation method of porous adsorption-catalysis material for waste gas treatment based on biomass | |
| CN110065933A (en) | A kind of mixed base charcoal and preparation method thereof | |
| CN116034848A (en) | Kitchen waste biogas residue hydrothermal carbon-based growth matrix for promoting plant germination and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20201124 |